DSI XL Case - Super Mario or other character

HiI'm looking for an accessory pack or even just a hard case for a DSI XL. But I'm after one with Mario or some other character on. The only one i can find is Toy Story in Best Buy. While this is okay, I really wanted a Mario one or perhaps some other character. Any help would be appreciated! Don't mind paying full price, I just can't find a Mario one anywhere!Thanks